def triangles():
    l = [1]
    while True:
        yield l
        l = [0]+l+[0]
        for i in range(len(l) - 1):
            print(l[i]+l[i+1])
        l = [l[i]+l[i+1] for i in range(len(l)-1)]

if __name__ == '__main__':
    n = 0
    results = []
    for t in triangles():
        results.append(t)
        n = n + 1
        if n == 10:
            break

    for t in results:
        print(t)

    if results == [
        [1],
        [1, 1],
        [1, 2, 1],
        [1, 3, 3, 1],
        [1, 4, 6, 4, 1],
        [1, 5, 10, 10, 5, 1],
        [1, 6, 15, 20, 15, 6, 1],
        [1, 7, 21, 35, 35, 21, 7, 1],
        [1, 8, 28, 56, 70, 56, 28, 8, 1],
        [1, 9, 36, 84, 126, 126, 84, 36, 9, 1]
    ]:
        print('测试通过!')
    else:
        print('测试失败!')